TP3057BN

Product Summary

The tp3057bn is a comprised of a single-chip PCM codec (pulse-code-modulated encoder and decoder) and PCM line filter. These devices provide all the functions required to interface a full-duplex (2-wire) voice telephone circuit with a TDM (time-division-multiplexed) system. These devices are pin-for-pin compatible with the National Semiconductor TP3054B and TP3057B, respectively. These devices are designed to perform the transmit encoding (A/D conversion) and receive decoding (D/A conversion) as well as the transmit and receive filtering functions in a PCM system. They are intended to be used at the analog termination of a PCM line or trunk. The tp3057bn requires two transmit and receive master clocks that may be asynchronous (1.536 MHz, 1.544 MHz, or 2.048 MHz), transmit and receive data clocks that are synchronous with the master clock (but can vary from 64 kHz to 2.048 MHz), and transmit and receive frame-sync pulses. The tp3057bn provides the band-pass filtering of the analog signals prior to encoding and after decoding of voice and call progress tones. The TP3054B and TP13054B contain patented circuitry to achieve low transmit channel idle noise and are not recommended for applications in which the composite signals on the transmit side are below –55 dBm0. The tp3057bn is characterized for operation from –40°C to 85°C.

Parametrics

tp3057bn absolute maximum ratings: (1)Supply voltage, VCC: 7 V ; (2)Supply voltage, VBB: –7 V; (3)Voltage range at any analog input or output: VCC +0.3 V to VBB –0.3 V; (4)Voltage range at any digital input or output: VCC +0.3 V to ANLG GND –0.3 V; (5)Continuous total dissipation: See Dissipation Rating Table; (6)Operating free-air temperature range, TA: TP3054B, TP3057B: 0°C to 70°C; (7)Storage temperature range, Tstg: –65°C to 150°C; (8)Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: DW or N package 260°C.

Features

tp3057bn features: (1)Complete PCM Codec and Filtering Systems; (2)μ-Law – TP3054B and TP13054B; (3)A-Law – TP3057B and TP13057B; (4)±5-V Operation; (5)Low Operating Power . . . 50 mW Typ; (6)Power-Down Standby Mode . . . 3 mW Typ; (7)Automatic Power Down; (8)TTL- or CMOS-Compatible Digital Interface; (9)Maximizes Line Interface Card Circuit Density; (10)Improved Versions of National Semiconductor TP3054, TP3057, TP3054-X, TP3057-X.

Diagrams